The cheap buyer takes bad meat. [ Proverb ]

A wool seller knows a wool buyer. [ Proverb ]

The buyer needs a hundred eyes, the seller not one. [ English Proverb, collected by George Herbert ]

A dear bargain is always disagreeable, particularly as it is a reflection upon the buyer's judgment. [ Pliny ]

Patron or Customer? These nouns are generally used indiscriminately. A patron is a virtual benefactor; one who countenances, aids, or supports. A customer is a purchaser, or buyer, who expects in return for his money full value received. Hence it is erroneous for a merchant to say, He is a patron of mine, when he means simply a customer. [ Pure English, Hackett And Girvin, 1884 ]